Symbol: SNDCTL_DSP_SYNC
games/morse/morse.c
728
ioctl(spkr, SNDCTL_DSP_SYNC, NULL);
sys/dev/sound/pcm/dsp.c
1421
case SNDCTL_DSP_SYNC:
sys/sys/soundcard.h
1525
#define SOUND_PCM_SYNC SNDCTL_DSP_SYNC